I built my own Monarch-style finance dashboard with Opus 5.5 for less than $20

A developer built a Monarch-style personal finance dashboard, SharkFin, for under $20 using Opus 5.5. The dashboard connects bank accounts via SimpleFin to Actual Budget, an open-source backend for local data storage. The React-based frontend was developed using only 35% of a Claude Pro monthly limit. The creator focused on perfecting one section, the cash flow page, before expanding to other features, and is considering open-sourcing the project due to ease of development.

This report details a personal finance dashboard built with Opus 5.5 for under $20, unlike other reports that focus on the AI's capabilities without cost or specific application.